131065
Descrição
Mapa Mental por robynhattieemily, atualizado more than 1 year ago
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Criado por robynhattieemily
mais de 11 anos atrás
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Energy Transfer
- Conduction
- Needs particles to work.
- Works quickest in solids.
- Particles are heated
and then start vibrating
they collide with the
particle next to them and
pass on kinetic energy.
- Metals being heated
- Metals contain
free electrons
that can move
freely
- Metals are
excellent
conductors
because of
this.
- Metals contain
free electrons
that can move
freely
- Needs particles to work.
- Convection
- Needs particles to work
- Works in liquids and gases
- The particles are heated and
become less dense.
Because they become less
dense they rise.
- The particles then hit
cooler air or liquid
and cool down, they
become more dense
and therefore fall
- Convection current
- Needs particles to work
- Infrared Radiation
- Does not need particles
- Can travel
through a vacuum
- All objects emit
or absorb
infrared radiation
- Dark, matt
surfaces are
good emitters
and good
absorbers
- Does not need particles
- Evaporation
- Particles at the
surface of a
liquid have
enough energy
to leave.
- The average kinetic
energy decrease
because they have less
kinetic energy. The
temperature of the liquid
also decreases.
- Factors that increase rate of
evaporation: Increase
temperature, increase
draught, increase surface
area, decrease humidity and
decrease strength of
intermolecular forces
- Particles at the
surface of a
liquid have
enough energy
to leave.
- Larger surface
area=faster rate of heat
transfer.
- Energy cannot be
created or
destroyed
- Bigger temperature
difference=faster rate of
energy transfer
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